Related Experiment Videos
Temporal lobe epilepsy in early childhood
E Wyllie1, M Chee, M L Granström
1Department of Neurology, Cleveland Clinic Foundation, Ohio 44195-5221.
Insights
Early childhood temporal lobe epilepsy (TLE) presents with complex partial seizures (CPS) similar to adults. Video-EEG is crucial for localizing the seizure focus, especially in non-tumor cases.
Area of Science:
- Neurology
- Pediatric Epilepsy
- Clinical Neurophysiology
Background:
- Temporal lobe epilepsy (TLE) is a common epilepsy syndrome.
- Understanding electroclinical features in early childhood is crucial for diagnosis and treatment.
- Surgical outcomes for TLE in children are often favorable.
Purpose of the Study:
- To investigate the electroclinical characteristics of TLE in young children.
- To evaluate the utility of video-electroencephalography (video-EEG) in localizing the epileptogenic zone in pediatric TLE.
- To compare EEG findings in TLE with and without temporal lobe tumors.
Main Methods:
- Retrospective analysis of 14 children (16 months to 12 years) with TLE and seizure-free outcomes post-temporal lobectomy.
- Review of video-EEG recordings, neuroimaging, and histopathological findings.
- Correlation of seizure semiology and EEG findings with underlying etiology (mesiotemporal sclerosis, cortical dysplasia, low-grade temporal neoplasms).
Main Results:
- Children exhibited complex partial seizures (CPS) with automatisms, simpler in younger patients.
- Video-EEG was critical for localizing the epileptogenic zone in children with mesiotemporal sclerosis and cortical dysplasia.
- EEG findings were complex and less localizing in children with low-grade temporal tumors, though video-EEG confirmed epileptic seizure semiology.
Conclusions:
- Early childhood TLE shares semiological similarities with adult TLE.
- Video-EEG is essential for precise localization of the seizure focus in TLE without tumors.
- In pediatric TLE with temporal tumors, video-EEG's primary role is seizure confirmation rather than precise localization.
Abstract:
To explore the electroclinical features of temporal lobe epilepsy (TLE) in early childhood, we studied results of video-EEG and other tests of 14 children aged 16 months to 12 years selected by seizure-free outcome after temporal lobectomy. Four children had mesiotemporal sclerosis, 1 had cortical dysplasia, and 9 had low-grade temporal neoplasms. The children had complex partial seizures (CPS) with symptomatology similar to that of adults with TLE, including decreased responsiveness and automatisms. Automatisms tended to be simpler in the younger children, typically limited to lip smacking and fumbling hand gestures. Scalp/sphenoidal EEG showed anterior/inferior temporal interictal sharp waves and unilateral temporal seizure onset in the 4 children with mesiotemporal sclerosis and in the child with cortical dysplasia, but EEG findings in 9 children with low-grade temporal tumors were complex, including multifocal interictal sharp waves or poorly localized or falsely lateralized EEG seizure onset. In children without tumors, video-EEG was critical to localization of the epileptogenic zone for resection, but in patients with tumors video-EEG was less localizing and its main value was to confirm that the reported behaviors were epileptic seizures with semiology typical of temporal lobe onset.